JPS585991B2 - Sansen line nadoniokeru - Google Patents

Description

[Detailed description of the invention] This invention provides a pickling tank in a pickling line for thin steel plates, etc.
This paper relates to a method for automatically controlling the speed of the central part of a pickling line, etc., which automatically controls the speed of the central part of a line such as furnace equipment.

Generally, in facilities such as pickling lines, the main operations are coil connection work at the line inlet side and coil division work at the line outlet side.

To explain this as a typical example of equipment in FIG. It is welded at well 6.

During this connection work, the entry side section 1 is stopped, and at that time, the I-IJ whelks are supplied from the inlet side S1-IJ whelk storage device 7 to the central section 8 such as the pickling tank.

On the other hand, in the outlet section 9, the ears of the S1-IJ whelk 5 coming out from the pickling tank via the outlet S1-IJ whelk storage device 10 are removed by the side l-'J711, and the outlet shear 12 The coil 14 is formed by dividing it into predetermined dimensions and winding it up with the tension reel 13. However, since the outlet part 9 stops during the division, the stream 1-IJ tube 5 from the pickling tank 8 is removed from the outlet part 9. It is configured to be stored in a side strip storage device 10.

Recently, pickling lines, etc. in particular, have become faster and longer line facilities, and the distance between the entry and exit sides is more than 200 meters, making it difficult to understand the working status of each other on both sides. There is.

In addition, to determine the speed at the center of the line, the speed calculated based on the length of the strike IJ knob is modified based on the experience of the workers, and the speed is manually adjusted each time work is performed while the side section of the line is stopped.
Generally, this work is carried out by an operator at the outlet side of the line, who can quickly judge the progress of the coil connection work at the inlet side, the situation at the outlet side, and the storage status in the outlet side storage device. It is necessary to take appropriate measures.

Therefore, when the operating level is high, the burden is extremely large.
Depending on the operator's individual differences, physical condition, etc., differences in efficiency may occur, resulting in fluctuations in stop time, as well as erroneous judgments, which may result in incorrect central speed.

This invention provides a method for automatic central speed control in pickling lines, etc., which eliminates the above-mentioned drawbacks by automatically controlling the work progress while the equipment on the exit side is stopped and the storage status of the strip storage device. is intended to provide.

Next, an embodiment of the present invention will be described. In a pickling line, etc., which consists of a line inlet side, an inlet strip storage device, a central portion such as a pickling tank, an outlet strip storage device, and a line outlet side, the inlet side The operating principles of the and outlet sections are the same except that the former reduces strip storage and the latter increases.The basic operating speed pattern 7 is calculated by the following formula (1) as shown in FIG. It is acceptable to display it as .

That is, the coil strip length (m) is L, the length of the strip running at the center speed or higher) is Ll, and the storage amount required for the center strip running while the exit side is stopped -) is LION.
The maximum speed of the person or exit side (m/m1n) is ■, and the central speed <ry'=) is ■.

, punching speed or threading speed (m/'I/1i1t)
is v, maximum speed running time (sec) is tl, center speed synchronization time (sec) is t2, time required for penetration or threading (sec) is t3, acceleration/deceleration time (sec) is t Off-gauge processing, welding , the time (sec) required for division, resizing, etc. is t.

First, calculate the coil length from the coil weight, name, thickness, and width for each coil with different specifications, and then calculate the value.

Binding, calculated cysL. Ori. = L'o, or create appropriate groups according to thickness, width, and weight in advance and select items within that range.

= Decide on LoL.

Next, by inserting each coefficient when assuming an ideal pattern into the above equation (1), a quadratic equation of V, that is, AVJ-BV
This V in advance as o+Lo■-〇.

Calculate and always make it possible to specify. For example, when the coil is 3.2 mm thick x 101000 mm wide and weighs 17 tons, ■.

=2601nrIL. Now, when the processing of the Nth coil is completed and the connection work with the N+1th coil begins, (1) the calculated value, that is, V;

=Vo(N+1), the center speed is set by a command from the computer.

On the other hand, with the above set speed control while the exit side is stopped, the storage device moves according to the increase or decrease in the storage amount of the large or exit side strip storage device, so it is not possible to detect the moving distance from a certain fixed position. From this, it is possible to calculate the remaining effective strip storage amount, and therefore, it is possible to calculate the remaining effective time of the storage device assuming that it is operated at the central speed at that time.

Also, people. Since the work while the exit side is stopped can be classified into several types of standard patterns, the standard stopping time, that is, T, can be determined according to the patterns.

It is possible to set =t3+to. Next, the progress of the stopping work is determined in each section from a predetermined set point, as illustrated in FIG. 4 as an example.

By sending a detection signal every time a work process is completed,
It is possible to calculate the standard setting elapsed time up to that point. For example, in the same figure, Tol, To2...T
O7, etc., and therefore the remaining expected stop time can be calculated freely.

In other words, if the remaining effective time of the storage device is tAsec, then it will be tAsec, and then LA=nA=n・(L−(l'+xl
)), and its constituent symbol is LA=
remaining effective strip storage amount), n = number of storage strip turns, A - remaining effective travel distance of the storage device (m),
l'--storage device allowance movement distance (m); Xl--storage device movement completion distance (mm).

Furthermore, the expected remaining stop time tBsec of the out-of-person side section is defined as the standard out-of-person stop time To and the standard elapsed time up to the intermediate work section during the standard down time T.

If i, then tB=To−T□i.

Therefore, by comparing the times tA and tB and adjusting the central speed so as to eliminate the difference between the two, the speed can be automatically controlled depending on the situation even when the equipment on the outflow side is stopped.

t... Wow, ya.

,” Shigeru. 2-轡、A6KA、AtB et al., △Vo-V.

2-Vo1=60-LA(±-±)BLA Therefore, the center speed of the current operation ■.

What is necessary is to increase or decrease the above Δ■o.

Note that although a margin of travel distance l' is provided for the effective travel distance of the storage device shown in Fig. 3, there may be variations in the final stop work division time when using the above-mentioned control method, and that part due to unknown factors. This is provided for time extension etc.
When the storage device reaches this position, the central velocity will be equal to the preset minimum velocity, for example 60 m/ml! Automatically decelerated to 1st class.

In addition, in the automatic control described above, the control operation is performed for each -coil on the outflow side, and when the outage side stops overlap, each △vo is calculated and one of the inner thin out values is calculated. The center speed will be automatically controlled to the lower speed.

As described above, the present invention divides stopped work processes and automatically corrects the center speed from the division completion signal, in contrast to the conventional manual adjustment work that relies on the operator's intuition. As a result, the burden on the operator can be significantly reduced, and the central speed can be stabilized, making this invention highly beneficial.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an example of equipment such as a pickling line, Fig. 2 is a diagram showing an example of an operating speed pattern on the outflow side, and Fig. 3 is a system diagram showing an example of a strip storage device. 4
The figure is a diagram showing an example of work process classification during stoppage. 1...Line entry side part, 7...Inlet side strip storage device, 8...Central part of pickling tank etc., 9...
・・・・・・Line outlet side part, 10・・・・・・Outlet side) I
J Tsubu storage device.

Claims (1)

[Claims] 1. Calculate and set the center speed in advance from each coil specification and an assumed operating speed pattern, and calculate the remaining expected stop by transmitting a detection signal according to the progress of the stopping work on the outgoing side according to the pattern. From the time and the remaining effective time calculated from the device movement completion distance detected according to the storage amount of the S1-IJ tube storage device at that time, an increase/decrease with respect to the central section speed calculation value is calculated, and the increase/decrease is calculated. An automatic center speed control method in a pickling line, etc., characterized in that the center speed is automatically controlled according to the amount. If work to stop the two lines on the outgoing side occurs at the same time,
The automatic center speed control method in a pickling line, etc. according to claim 1, characterized in that the center speed is the lower speed of both calculated values. 3. An automatic center section speed in a pickling line or the like according to claim 1, wherein a surplus storage capacity is provided at the final end of the three-strip storage device, and when the range is reached, the center section speed is reduced to a predetermined minimum speed. Control method.